Isaac hermann



UNITED STATES PATENT OFFICE.

ISAAC HERMANN, OF NE7 YORK, N. Y.

SAFETY-CLASP FOR BRACELETS, 85C.

Specification of Letters Patent No. 18,245, dated September 22, 1857.

To all whom t may concern:

Be it known that I, IsAAo HERMANN, of the city, county, and State of New York, and a citizen of the United States, have invented a new and Improved Mode of Safety- Clasp for Bracelets and other Purposes; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

Construction-I have a hollow plate Al A, Figure I, with sides as shown in Figs. II and III. On this hollow plate there are two recesses c c, Fig. I, and shown in Figs. II and III by the same corresponding letters. At 0, Fig. I, there is a hollow screw and at a spiral spring in a cylinder, made of gold alloyed to any degree of hardness required. Passing into the recesses is a rod L, on which is secured a plate B, and projecting from this plate B are two catches E E, Fig. I. On rod L there is fastened an inclined plane or angular piece G, Fig. I, shown also in Figs. II and III, by the same corresponding letters. On the hollow plate, Fig. II, there is a plate H, H, passing around and beneath a plate K. This plate K fits closely into the shoulders of H H. From the plate K there is a projecting knob F having an inclined plane which rests against the face of the inclined plane G, Fig. II, and shown in Fig. III, with corresponding letters. In Fig. I, at D and E E the clasp is shown with catches tting E E.

Operation-Uien the clasp is closed and it is required to be opened, the ornamental cap piece K is pressed upon. This brings down the inclined plane surface F, Fig. II, against the inclined plane surface G, Fig. II, and throws the rod L on one side, as shown in Fig. III, and releases the catches E, E, E E, shown in Fig. I. On releasing the pressure, the catches are thrown back by the spiral spring X X, see Figs. II, and III.

What I claim as my invention and desire to secure by Letters Patent, is-

The application of the two inclined plane surfaces F and G, Figs. II and III, and the plate B attached to rod L for the purpose herein set forth, namely, to secure more safely clasps on bracelets, and for other purposes, and I also claim the combination of the steadying plate B, with the parts above mentioned, which plate prevents the catches E, E, Fig. I, from turning aside. The whole is in combination, that is plate B, Fig. I, inclined planes F G, on rod L, Figs. II and III, as above set forth.

ISAAC HERMANN,

Vitnesses:

JACOB PEoARE, BEMSTER. 

